Improvement in grates



2 Sheets--Sheet I I F0 RRESTER.

Patented July 6, H875.

mieszew:

NITED STATES PATENT OFFICE JAMES VVARMINGTON AND JOHN FORRESTER, OFCHICAGO, ILLINOIS.

IMPROVEMENT IN GRAT ES.

Specification forming part of Letters Patent No. i 65 279, dated July 6,1875; application filed June 11, 1875.

' To all whom ttmay concern:

Be it known that we, JAMES WARMING- TQN and JOHN FoRREsrER, of the cityof Chicago, Cook county, State of Illinois, have invented new and usefulImprovements in Grates, of which the following is a full description,reference being had to the accompanying drawings, in Which- Figure 1 isa front view Fig. 2, a bottom view; Fig. 3, a top view; Fig. 4, avertical section; Fig. 5, a back view with a portion cut away to showthe air-pipe and Fig. 6, a detail in section, showing the mode ofholding the revolving basket in place.

The nature of our invention consists in providing an open grate with arotary furnace or fire-pot, havingits sides and bottom revolving inopposite directions, in providing the back with revertible flues and anair pipe or heater, and in the several combinations hereinafter setforth and claimed.

In the drawings, A represents the grate; B, the vertical portion orsides of the'furnace; O, the supporting cross-bar; D, the bottom; E, F,and G, the fines; H, the air-space; I, the air-pipe; a b, flues oropenings; 0 d, the dampers; e, a gear-wheel; f, the gear-teeth on therevolving bottom; g, the pivot; h, the opening into the air pipe orspace t, the gearteeth on the revolving sides of the furnace; j, groovein the outer edge of the revolving basket of the grate; k, set-screws.

The casing or walls A of the grate may be made of metal, fire-brick, orother suitable material, as may be found most convenient for thelocation in which it is to be placed. They are made double and providedwith lines E F G,'and an airspace between them, a suitable cross bar orbars being located near the bottom, as shown at Fig. 1, upon which therevolving grate is placed. This grate is made to come within from one totwo inches of the back sides, so as to leave an air-space between them.The grate is made vertical, as shown,

and on its bottom is provided with gear-teeth i. A gear or cog wheel isplaced on the shaft 0, which engages with the teeth '5, and also withthe teeth f on the revolving bottom D, so that when the grate is shakenthe sides or basket B will move in an opposite direction The flues E Fare made from the bottom D.

against the face of the outer case, as shown, and are connected at thebottom or near the hearth by a horizontal flue, G. The space between thehorizontal flue and the upright flues is filled with a coil of pipe, I,for the purpose of heating air. The air is taken into the pipe beneaththe grate, at h, which, as shown, is a simple opening, but may be, ifdesired, extended to the front or side of the ashpit by a section ofpipe, so as to avoid taking up ashes. The outer end or ends of the pipe,for the purpose of distributing hot air, may be extended around the sameroom or upward into another room, as desired. By leaving a space betweenthe grate and the back of the case the combustion of the fuel is perfecton that side which heats the back, so as to heat the air. We thusutilize what otherwise would be waste heat. To keep the basket orvertical sides 13 of the grate in place, and prevent its being raisedup, a groove, j, is made in the outer edge of the bottom there of, intowhich the set-screws k fit, as shown at Fig. 5.

In kindling the fire, or in putting on fresh coal, the dampers 0 d areboth opened, which permits a straight ascension of the products ofcombustion into the chimney. 'When the heavy smoke has passed off, thedamper c is drawn over the flue a on the under side, which causes theheated products to pass through the flue b; the damper d is then drawn,which causes the heated products to descend the flue F, pass aroundthrough the flue G, and then ascend through the flue E, and out into thechimney at the upper opening of the flue a, which gives a base heat, andalso an additional heat to the air-chamber H, and also gives us thebenefit of the revertible flue and air-heating space with an openfire-grate.

The grate, as shown, is designed to occupy the place of an ordinary opengrate or fireplace, and when in this position, as before stated,theback, with its flues, may be made of brick or other suitablematerial, as well as of cast-iron. When made of cast-iron, however, thisfurnace or grate, and backing, may be used as a stove or heater withoutbeing set in mason-work, by applying to it ametal base with ,suitablesupportinglegs, and an ordinary stove-pipe over the fines a b, and itwill also be obvious that the pipe I, for the heat substantially as andfor the purpose herein ing and discharge of the hot air, may bedescribed. brought out at the top or other point, as well 3. The flues EF G and heating-space H,

as at the sides, as shown. in combination with the grate and the air-What we claim as new is as follows heating pipe I, all constructed andarranged 1. The combination, in a grate, of the vertias and for thepurpose herein specified.

cal section B and horizontal section D with I JAMES WARMINGTON.

the'spurs or teeth f t and Wheel 6, substan- JOHN FORRESTER.

tially as and for the purposes specified. Witnesses:

2. The flues E F G and openings a b, in E. A. WEST,

combination with the dampers 0 d and grate, O. W. BOND.

